Signal system for railway cars



July 22, 1924. 1,502,419

` A. E, BLAYLocK SIGNAL SYSTEM FOR RAILWAY CARS Filed May l5. 1921 MMT-r Ww /x Patented July 22, 1924.

,unirse STATI-:fs

AVERY E. BLaYLocK, or LITTLE BLOCK', Anal/rusas,

SIGNAL ,sYsTEM son; aAiLWAY GARS.

Application led May 13,

To all whom it may concern.'

Be it known that I, .Ai/'Enr E. BLAYLOCK, a citizen of the United States of America, and resident of Little Rock, in the county of Pulaski and State of Arkansas, have invented certain new and useful Improvements in Signal Systems for Railway Cars, of which the following is a specification.

My invention relates to a safety' signal system and attachment adapted to be employed on hand cars or gasoline motor cars used on railroads equipped with an electrical block system of either the charged Itrack section, or bonded rail type. Y l

The primary object of the invention is the provision of a system of circuits including magnets, an armature, a buzzer, and local batteries, adapted to be interchange,- ably used on either a hand ycar or gasoline motor car, in which when used on a Ymotor car, the engine circuit is included, so that when a train enters the blockoccupied by the car, the engine circuit will be broken stopping the car, andthe buzzer will` sound a warning in either case. y

Another Objectis to provide, in a system of this character, means for rendering the system inoperative without interfering with the engine circuit included therein, when it is desired to use a motor car to trail other cars through the block.

A further object is to provide, in a system of this character, means for testing the system irrespective of thel type of blockV signal system in connection with which the, car is operated.

With these, and such other objectsin view as will be apparent from therdescription, my invention resides in the novel construction, combination, and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawing, in which;

Fig. 1, is a diagrammatic representation of the circuits and elements yof the.' invention, and Y Fig. 2, an elevation of a car illustrating an element employed.

In detail, the invention comprises a car 1 which may be of any preferred type of hand or motor operated, provided with wheels 2 insulated from the axles 3 by means of insulating rings 4;, to prevent a short circuit across the rails 5. Mounted on the car body is a pair of trailing contact members 6, held in contact with the rails by means of springs 7. The car engine circuit is dia- 1921. l serial/No. 469,379'. i

grammatically represented atiE of Figll, in whichis disposed the usual switch 1e rfrom the poles Lof which lead wires 8 and 9 and in which the engine is indicated by C. M denote-s a pair of connected magnets having an armature carrying an extension X which is normally engaged against a pair of ycontacts 10 andV 11 through the action of a retractile: spring S. Contacts 10 and 11 arey adjustably mounted in posts 12 and y13 respectively, and arranged on thev opposite side of the extension X,'yis afpair ofcontacts 14 and. 15 carriedin posts 16 and 17 and adaptedto be' .engaged-,by the extension X ywhenth'emagnets are energized.` I

B designates signalr means comprising in this instance a buzzer, having arlocalbattery Gr. An additional 'battery' H is arranged in the system aszhereinafter de s'cribed. .A series of lknife switches, J, K, L, O, l?. R, 'IMand U, are arranged in the system in connection lwith the )various elements bymeansof wires .7h-yf', k,-0",',ZZ', o, 0, 79, p, r, 7", t,Quand'u/,which lead respectively from the ,switchk points.A The magnets are in connection with theV system by'means of wiresmvand m', and the rail contact members V 6 are likewise connected by Iwires 6 and 6". f Y In Fig. 1, 'I have illustrated the system Aas in use on a car, occupying a block using the bonded yrailsvstem and in which current is fed from the local battery H on the car. In this system, the switches O, P and R are closed, leaving all others open. The 4magnets M yare normally deenergized and `the enginey ignition circuit (disregarding the directionr of the current) is from the battery in theE circuit over wire 9, wirer 0', switch O, wire o, wire 13', vpost 13 across X, post 12, wire 8 and return, .the car rproceeding without interruption. en a train enters the block, a circuit ,is completed through the wheels and axles of theytrain and the rails throughy contacts 6 throwing local battery H into circuit, energizing magnets M, breaking the engine circuit to stop the carJ and operating the buzzer. The magnet circuit will be as follows; battery H, wire H', wire m, magnetsM, wire m', wire `6, one rail, wheels and axles of the truck of the train in advance, the other rail, wire 6', wire p, switch P, wire p', back to I-I. Armature A is drawn down, breaking the engine circuit and closing the buzzer circuit which is as follows; battery G, buzzer B, wire b, post lll) .M,vvire, mi, vWire la', switch K, yWire lo, Wire 6, yto Votherrail, kusing n the Yblocksystem current. The v.engine circuit Will be as follows; givire, post 17, across X, post 16, Wire 77,

A,switch J., kWire j, Wire`v9 and return, the car vprocefe,ding Without interruption. lWhen a l train enterS the block, the contacts 6 willl be '.shortcircuited, deenergizing .the magnets.

Armature VXraises by'action of. spring S,

breakingvcthe engine Acircuit at 14 and 15,- f v and stopping A.the car. -Contacts -10 and I1.1 Y, -ifvill then be bridged closing the local circuit of the" buzzer, which is as follows; battery G, vrbuzzer B', Wire Z9', post 1:2 (across X, post vvireA 13', switch L, Wire Z, back itoaGr, si'lnding' an alarm..4

i* .Should itbe desired to test Vthe device While running in-.eithertypeO-t block signal system, switch U isclosed., In the arrange,- ment shown `in Fig. 1, when U is closed, magnets M are" energized, circuit being from battery-H, `.Wire Zr, Wire magnets M, Wire' rfv/,cwire cui. switch U, Wire u, Wire 0, switch P, Wire p", back to 'H. The Y engine circuit will bebroken at 10 and k11,'st'opping the` car, and the .buzzer Will sound, the. circuit being from battery G, buzzer B, Wire b, post 17,5acr0ss post 16., Wire r, switch 'R3 Wife r back L0 G'- f On a charged track section system, Where switches Je LK, and' 'L are Closed, when l switch U is .-close'd, k the same results Will be I. buzzer Y lbe from battery G. buzzer B,.Wire 6.', fcv

icconiplis,hed'.v Contacts 6 ywillbe yshort cir-v cuited throughl WiresV u, u and U, deen' ergizing the `magnets,i;breaking the engine circlnt at liand 151 Vand operating the Buzgzer circuit in this instance, will ,post 12,-across X post 13, Wire 13'-, Wire Z, switch L, wire 'backto'Gj y y ,l/Vhen it 'is desired to use lthe carto ytrail other cars over =the block, switch T is closed,

leaving.V all others open. The engine .circuit Y n circuit making and v'lVhile I have described'vand illustrated certain elements and arrangements t'hereor", Whichenterinto the construction and operation of my'invention. .I desire-it to beunderstood that I do not limitmyseltto these, but that any Within the scope of the invention' as claimed.

I claim y Y 1. In association V,With an electrical block rail system, theycombination of 4a motor driven vehclehaving a `Inotorcircnit, the Wheels otsaidvehicle that Vcontactlone rail being insulated from the Wheels that contact the other rail, and alsafety device comprising an electrical alarm and a control device, said control device beingpoperated by the short circuiting of the rails and .comprising breaking elements adapted :to close the alarm circuit. and open Athe such may be used fas will fall z Y soY motor circuit upon said short circuiting of means forV Atesting lits operationindepend j ently of the.shortUcircniting` of the rails.V

Y Y AVERY EBLAYLOCK- Witnesses: ,y Y

J. F. SHUMWAY, F. B. Fox. 

